Harold Keen (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Harold Keen" in English language version.

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arquivo.pt

Mary Stewart, 'Bombe' Operator, interviewed in "The Men Who Cracked Enigma", UKTV History Channel documentary series "Heroes of World War II", 2003

"Outstations - A Brief History", Bletchley Park Jewels, retrieved 1 May 2010
"Outstations from the Park", Bletchley Park Jewels, archived from the original on 13 December 2009, retrieved 16 April 2010

Toms, Susan (2005), Enigma and the Eastcote connection, archived from the original on 4 December 2008, retrieved 16 April 2010

"Outstations from the Park", Bletchley Park Jewels, archived from the original on 13 December 2009, retrieved 16 April 2010
Toms, Susan (2005), Enigma and the Eastcote connection, archived from the original on 4 December 2008, retrieved 16 April 2010